文章摘要信息

中国电机工程学报 2008, 28(26) 7-13 DOI: ISSN: 0258-8013 CN: 11-2107/TM

本期目录 | 下期目录 | 过刊浏览 | 高级检索 [打印本页] [关闭]

热能工程

	扩展功能

	本文信息
	Supporting info
	PDF(395KB)
	[HTML全文]
	参考文献[PDF]
	参考文献
	服务与反馈
	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	引用本文
	Email Alert
	文章反馈
	浏览反馈信息
	本文关键词相关文章
	汽轮机
	湿蒸汽
	流场
	鼓风态
	测量
	本文作者相关文章
	蔡小舒;宁廷保;牛凤仙;吴广臣;宋延勇;尚志涛;徐则林;岑岺山;郭养富;张瑾;李岗
	PubMed
	Article by

300 MW直接空冷汽轮机低压末级鼓风态流场及湿度测量

蔡小舒¹;宁廷保¹;牛凤仙¹;吴广臣¹;宋延勇¹;尚志涛¹;徐则林²;岑岺山³;郭养富³;张瑾³;李岗³

上海理工大学动力工程学院¹国电科环节能中心²漳山发电有限公司³

摘要：研制了基于多波长消光法和4孔楔形气动探头的改进型联合探针，用该探针测量了某电厂300 MW直接空冷机组低压汽轮机末级后在满负荷40 kPa背压运行时末级后的流场和湿蒸汽。测量结果表明该汽轮机在该工况运行时低压缸末级产生鼓风，并有叶片根部的回流，鼓风区域约占叶高的51%，在鼓风区蒸汽湿度为零，鼓风状态时末级平均湿度仅0.23%，低压缸效率84.9%，次末级也存在鼓风现象。鼓风时运行表计指示的第7级抽汽温度不是汽缸内汽流的真实温度，而是鼓风温度。

关键词：汽轮机湿蒸汽流场鼓风态测量

Measurement of Flow and Wetness in Windage Condition in a 300 MW Direct Air-cooling Low Pressure Steam Turbine

CAI Xiao-shu NING Ting-bao NIU Feng-xian WU Guang-chen SONG Yan-yong SHANG Zhi-tao XU Ze-lin CEN Ling-shan GUO Yang-fu ZHANG Jin LI Gang

Abstract: A new probe was developed based on the principle of multi-wavelength light extinction and 4 holes wedge probe. Flow field and wetness behind the last stage in a 300MW direct air-cooling low pressure(LP) steam turbine were measured with this probe. The load and back pressure of the turbien were 300 MW and 40 kPa, respectively. The results show that there is windage in the last stage and the 2nd last stage. The region of the windage is about 51% in the total height of the last blade. The avarege wetness of the exhaust steam is only 0.23%. In the windage region the wetness is even zero. The internal efficiency of the LP turbine is 84.9% that agrees well with the thermal performance test. Temperature of 7th extraction steam indicated by the operating gauge is not the real temperature of the main steam tream, but the temperature of windage steam.

Keywords: steam turbine wet steam flow field windage measurement

收稿日期 2008-02-15 修回日期 1900-01-01 网络版发布日期

DOI:

基金项目:

通讯作者: 蔡小舒

作者简介:

作者Email: caixs@public.sta.net.cn;usst_caixs@163.com

参考文献：

本刊中的类似文章

1．叶军.基于Vague集相似度量的汽轮机故障诊断的研究[J]. 中国电机工程学报, 2006,26(1): 16-20

2．陈颖敏张胜寒李育宏陈小芹.30Cr2MoV汽轮机转子钢电化学行为的研究[J]. 中国电机工程学报, 2006,26(4): 66-70

4．周封管春伟李伟力赵芬.铁耗和环流损耗分布对定子温度场及绝缘外表面散热系数计算的影响 [J]. 中国电机工程学报, 2009,29(21): 124-130